import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/index")
public class IndexServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //1. 先获取到当前用户对应的会话对象
        HttpSession session = req.getSession(false);
        if(session == null)
        {
            resp.setContentType("text/html; charset=utf8");
            resp.getWriter().write("你当前尚未登录");
            return;
        }

        //2. 从会话中拿到之前存储的用户信息
        String username = (String) session.getAttribute("username");
        Long loginTime = (Long)session.getAttribute("loginTime");

        //3. 生成一个页面
        resp.setContentType("text/html; charset=utf8");
        String respBody = "欢迎你" + username + "! 上次登录时间为: " + loginTime;
        resp.getWriter().write(respBody);
    }
}
